大乘起信論裂網疏 2.20

2.20

Question: If deluded thoughts are entirely exhausted, this should be the mark of the ultimate stage; why is it called "partial realization"? Answer: At the time of the true path of seeing, because all conceptual discriminations do not become active, and because the tathatā realized is without limitation, it may also be said to be "entirely exhausted". All subsequent advancements consist of untainted wisdom factors and are called true cultivation. Unlike the tainted wisdom born of hearing, contemplation, and cultivation, which is called conditioned cultivation, they are therefore no longer called deluded thoughts.